Apparatus



H. TSCHEHNING.

MOLDING APPARATUS. APPLICATION FILED SEPT. 13. 1918.

L3M 922 Patented May 2?, 1919.

3 SHEETSSHEET I.

H. TSCHERNING.

MOLDING APPARATUS.

APPLICATION FILED SEPT. 13. I918- ji gm gggg, I V Patented; Ma ,1919.

3 SHEETS- T 2- H. TSCHERNING. MOLDING APPARATUS.

APPLICATION FILED SEPT. 13. I9l8.

Pzitented May 27, 1919.

3 SHEETS-SHEET 3- LSUQ QQQQ nnrrnn srannr onnrcn HENRY TSCHERNING,OF FREEPORT, ILLINOIS, ASSIGNOR T0 ARCADE MANUFACTUR- ING- CGMPANY, 0F FREEPORT, ILLINOIS, A CORPORATION OF ILLINOIS.

MOLDING APPARATUS.

Specification of Letters Patent.

Application filed. September 13, 1918. Serial No. 253,853.

To all whom it may concern:

Be it known that I, HENRY TsoHnRNING, a citizen of the United States, and resident of Freeport, in the county of Stephenson and State of Illinois, have invented certain new and useful Improvements in Molding Apparatus, of which the following is a specification, .reference being had therein to the accompanying drawing.

The general object of this invention is to secure several new and important features in molding machines of the Well known sand jarring type. One of these features involves the use of a mold arranged for inversion While in place and provided with a distinct flask-carrying member which is jarred or jolted by itself, without affecting the rest of the machine.

In the accompanying drawings,

Figure 1 is a perspective view of the machine with a pattern in place but Without the flask.

Fig. 2 added.

Fig. 3 is a view like Fig. 1 in point of View but showing the flask as inverted and the pattern as withdrawn therefrom.

Fig. 4 shows the relation of the jarring cylinder and its piston.

Fig. 5 is a detail section of the sup-port for a base table. K

Fig. 6 is a perspective view of flask clamping devices.

In these views, 10 represents a heavy base from which rise frame posts 11 connected at their upper ends by any. suitable framework 12. On each of the end pairs of posts moves a strong slide 13, the two slidesbeing raised together by piston rods 14: carried by pistons Working in cylinders 15 on the base. The slides are provided with bearingsfor the ends, or stub shafts 16 upon the ends, respectively, of a heavy rotary table or crosshead 17 provided with a central vertical opening in which fits, normally, a vertical air cylinder 18 having at its'upper erida thick integral flange or plate 18 overlap ping and normally resting upon the portion of the crosshe'ad adjacent to the cylinder. The cylinder is provided with an axial projection 19, usually of steel, which during jarring or jolting rests upon a heavy memis an analogous view with the flask.

ber 4:6, hereinafter mentioned, and transmits to it the jarring shocks which it resists. In the cylinder 18 works a piston 18" having at its upper end a heavy integral flange or plate 20 the plane upper surface of which is continuous with the plane upper surface of the piston and the lower surface of which strikes upon the upper end and flange of the air cylinder when the piston descends in its sand jarring vibrations. The plate 20 Patented May 2?, 19119. I

is provided with studs upon its edges to be engaged when desired by hooks 27 operated by handles 28, and on this plate rests a pat tern plate 21 bearing patterns 22, in this instance shown as hollow cylinders. When the patterns are in place a flask 29 is placed over them and is made to register properly by the usual guide pins. A sand-retaining frame 30 is placed on the flask and aprons 31 hinged to the frame 12 are swung down upon the frame to lessen the spilling of sand. The flask and frame being filled with sand the hooks 27 are disengaged leaving the plate 20 and piston free. If air be then admittedv to the jarring cylinder by opening a valve 32 in a compressed air pipe 33, supplied from any suitable source, the piston and its plate 20 will be rapidly raised and lowered, the flange 20 at each descent being abruptly arrested by the flange 18 which is unyieldingly supported by the projection 19 and the member 46. In other words, during jarring the flask and its contents are supported upon a piston which reciprooates rap- I idly without disturbing other parts, even the inverting crosshead remaining stationary. The devices whereby the admission of air to the cylinder causes rapid reciprocation of the piston therein are such devices as are commonly employed in this art for this purose. p Jarring being completed, the valve-32 is closed and the aprons are folded back as shown in Fig. 1. The frame 30 is then dragged horizontally from the flask, removing any surplus sand. A board 35, Fig. 3, is then placed upon the flask and secured by hooks 36 pivoted to swing over the margins of the board and actuated by a handle 37 having the form of a bent lever pivoted at one end and connected at the bend, by a link '38, to the middle of a swinging bar 39 having each end adjustably secured to a ter- I minally pivoted lever 40 on the middle part of which one of'the hooks 36 is mounted to swing in and out for engaging and disengaging the board 35. By depressing the handle or lever, the two hooks are drawn downward and as the pivotal connection between the lever and link is carried rearward beyond the straight line from the lever pivot to the swinging bar, the bar is locked in depressed position, a spring 41 tending to prevent its being unlocked.

The plate 20 being engaged by the hooks 27, air is gradually admitted to the two cylinders by means of a common disk or multiple-way valve 34 controlling pipes 43, 44 leading to the lower and upper ends, respectively, of the cylinders 15, so arranged that air escapes from above while it enters below and thereby the crosshead is raised to the top of the machine. When raised, the crosshead is released, so that it may rotate on its axis, by means of a handle 45 and devices such as perform the same function in Well known machines of this kind. The cross head being then inverted, the valve 42 is turned to admit air to the upper ends of the cylinders and allow its escape from the lower end, and thereby the crosshead is gently lowered until the flask rests upon the table 46. The hooks 36 are then disengaged and the valve 42 is again shifted to admit air slowly to the bottom of the cylinders, and thusthe pattern is slowly lifted from the sand. During this withdrawal, the pattern is slightly vibrated by air from a valvecontrolled pipe 51, the devices employed being such as are used for a likepurpose in well known machines. The table 46 on which the flask and its contents now rest is a heavy casting normally resting in the base 10 and arranged to swing horizontally about a shaft 47, the weight resting upon bearings 48, 48. The shaft 47 is in threaded engagement with a nut 49 in the base 10 and is rotated by a hand lever 52 whereby the bearing member 48, fixed to the shaft, is raised lifting the member 46 slightly from the base 10 so that it is free to turn on the ball bearings, until the flask is swung to the position indicated by dotted lines in Fig. 8, preparatory to removing the flask. 'When that is done, the table is swung back over the base 10 and lowered by proper movement of the handle 52. v

. It has been assumed that the slides 13 move together, but such movement is assured by providing each slide with a stub shaft 23 which is connected by a link 24 to one of the two crank arms 25 of a rock shaft 26 supported from the base 10.

WVhat I claim is: 1. In a molding machine of the sand jarring type, the combination with a suitable a base adapted to resist the frame, of a crosshead or table revolubly mounted in the frame, a 'd means for jarring a mold supported by the revoluble head while the head is without jarring movement.

2. In a molding machine of the sand j ar ring type, the combination with a frame, having a central unyielding base member, of an invertible crosshead mounted in the frame, a mold supportingand jarring device carried by said crosshead and arranged to rest directly upon said base member during jarring action.

3. Thecombination'with a frame having a central unyielding base member, of an invertible crosshead mounted horizontally in the frame, a central jarring cylinder carried by the crosshead and extending below the same to rest upon said base member during the jarring operation, a mold-carrying reciprocating piston working in the cylinder and arranged to be abruptly stopped in its descent by rigid parts supported by said base member. 4. The combination with a frame of an invertible horizontal crosshead mounted for vertical adjustment in the frame, an unyielding base member below. the crosshead, and mold jarring devices carried by the crosshead arranged to be lowered upon said base member and to reciprocate the mold without movement of the crosshead.

5. The combination with a base and a frame rising therefrom, of an unyielding base member normally resting upon the base and arranged to swing bodily about a vertical axis and out of its normal position, and means for at will slightly raising the bearing upon which it swings.

6. The combination with a frame having an unyielding base, of an unyielding member normally resting upon the base and arranged to swing horizontally about an cecentrically located axis upon a bearing adapted to support its entire weight, and means for normally raising said bearing to gllow said member to swing free from said ase.

7 The combination with a frame base for the working parts of themachine, of vertical crosshead guides rigidlyfixed to the base, an invertible mold-carrying crosshead mounted to move vertically ina path fixed by the guides, centrall located means for jarring the mold, a' cy inder having its piston arranged to raise and lower one end of the crosshead, and devices distinct from thecylinder and piston for compelling identically similar movements of the two ends of the crosshead when either is raised or lowered.

8. The combination with a frame having force of jarring impact, of a manuall invertible crosshead mounted for vertica movements in the frame, a cylinder member carried by the icrosshead and supported from said base, durthe piston, means for detachably looking a ing the jarring operation, independently of flask to said support, and means for raising the crosshead, a sand jarring piston recipand lowering the crosshead when desired. M rocated in said cylinder in the usual way and In testimony whereof I hereunto afix my 5 arranged to have its descents abruptly arrestsignature.

ed by the cylinder and to be looked to the v crosshead at will, a flask support carried by HENRY TSGHERNING. 

